ZyXEL Communications GS2200-48, Руководство пользователя

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Chapter 24 IP Source Guard
GS2200-48 User’s Guide
227
24.7.1 ARP Inspection Port Configure
Use this screen to specify whether ports are trusted or untrusted ports for ARP
inspection. You can also specify the maximum rate at which the Switch receives
Log buffer size Enter the maximum number (0-1024) of log messages that were
generated by ARP packets and have not been sent to the syslog
server yet. Make sure this number is appropriate for the specified
Syslog rate and Log interval.
If the number of log messages in the Switch exceeds this
number, the Switch stops recording log messages and simply
starts counting the number of entries that were dropped due to
unavailable buffer. Click Clearing log status table in the ARP
Inspection Log Status screen to clear the log and reset this
counter. See
Section 24.6.2 on page 224 .
Syslog rate Type the maximum number of syslog messages generated by
ARP packets the Switch can send to the syslog server in one
batch. This number is expressed as a rate because the batch
frequency is determined by the Log Interval. You must
configure the syslog server (
Chapter 34 on page 301 ) to use this
setting. Enter “0” if you do not want the Switch to send log
messages generated by ARP packets to the syslog server.
The Syslog rate and Log interval settings interact. If the
Syslog rate number X is greater than Log interval seconds Y, X
divided by Y system messages are sent every second. Otherwise,
one message is sent every Y divided by X seconds. For example:
• If the Syslog rate is 5 and the Log interval value is 2, two
messages are sent every second.
• If the Syslog rate is 3 and the Log interval value is 6, one
message is sent every two seconds.
Log interval Type how often (0-86400 seconds) the Switch sends a batch of
syslog messages to the syslog server. Enter 0 if you want the
Switch to send syslog messages immediately. See Syslog rate
for information on the relationship between Syslog rate and Log
interval.
Apply Click Apply to save your changes to the Switch’s run-time
memory. The Switch loses these changes if it is turned off or
loses power, so use the Save link on the top navigation panel to
save your changes to the non-volatile memory when you are
done configuring.
Cancel Click this to reset the values in this screen to their last-saved
values.
Table 79 ARP Inspection Configure (continued)
LABEL DESCRIPTION